METHOD FOR AUTOMATIC SWITCHING ON ENERGENCY POWER SUPPLY FOR ENERGY CONSUMERS

摘要

A method for automatic switching on emergency power supply for energy consumers includes measurement of currents and voltages of positive sequence of the main and emergency power supplies, measuring an angle between voltage vectors of positive sequence of the main and emergency power supplies. Voltages of the positive sequence are measured on the high-voltage side of transformers which feed buses of the main and emergency power supplies and a difference between the voltage measurements for each section in-feed is determined.